Coil-winding machine



Nov. 27, 1951 J. s. BURGE ET AL.

`\ "OIL WINDING MACHINE 6 Sheets--Sheefl 1 original Filed March 11, 1947 mmm. www.

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J. s. BURGE ETAL COIL WINDING MACHINE Nov. 27, 1951 6 SheetsMSheet 4 Original Filed March 11. 1947 'I /NVENTOS s f J. S. BURGE \E.`|" AL COIL WINDING MACHINE 6 Sheets-Sheet 5 l /NVENTOES MW/J Nov. 27, 195] Original Filed March l1, '1947 SSN@ NOV- 27, 1951 .1. sfBuRGE ETAL 2,576,568 COIL WINDING MACHINE Original Filed March l1, 1947 6 Sheets-Sheet 6 Patented Nov. 27, 1951 COIL-WINDIN G MACHINE James S. Burge and Richard M. Goodwin, Anderson, and Hilton J. McKee, Middletown, Ind., assignors to General Motors Corporation, Detroit, Mich., a corporation of Delaware Original application March 11, 1947, Serial No. 733,758. Divided and this application June 23, 1950, Serial No. 169,936

6 Claims.

l This application is a division of application Serial No. .733,758, filed March 11, 1947, which discloses a machine for winding and taping electrical coils.

The invention claimed in this application relates to the power operated mechanism for rotating a form upon which wire is wound to make an electrical coil and for guiding the wire to the form from a wire supply.

An object of the present invention is to provide improved means for effecting the engagement and disengagement of a clutch which connects a power source with a Winder shaft and which causes 4the shaft to stop in a definite position automatically after a predetermined number of revolutions. To accomplish this object, the machine comprises a shaft, a coil winding form driven thereby, a power operated driving clutch member, a driven clutch member connected with the shaft, a first spring for urging the driven clutch member into engagement with the driving clutch member, a wire-guide control shaft, gears connecting the shafts for driving the second shaft continuously at a speed less than the speed of the first shaft, a cam driven by the second shaft, a wire guide under control by the cam, a device carried by the form for cutting the end lead of a wound coil and for anchoring to the form the start lead of the next succeeding coil, a mechanism adapted to operate said device when the form stops in a predetermined angular position, a control shaft driven by the second shaft through a lost motion connection which provides for movement of the control shaft independently of the second shaft, a clutch disengaging member connected with the clutch driven member, a cam operated by the third shaft to operate upon said clutch disengaging member to disengage the clutch against the action of said first spring slightly in advance of movement of the form to stopping position, a disc connected with the clutch driven member and providing a notch, a first shaft-locking member for engaging the notch after the clutch is disengaged, a second spring urging said locking member away from said disc, means operated by the control shaft for biasing said locking member against the notched member ahead of disengagement of the clutch whereby the rst shaft coasts into position in which the notch receives the locking member, and means for operating the control shaft independently of the second shaft to cause said cam of the third shaft to release said clutch disengaging member whereby said first spring is released to engage the clutch and to cause retraction cf the locking member biasing means whereby the second spring is released to retract the locking member from said notch.

A further object of the present invention is to provide for guidingv the wire to the form rotated by the Winder shaft in amanner such that the wire is biased for ready conformation to a form of oblong contour. This is accomplished by causing the wire to be received in succession by two guide wheels before it is received by the form. The wire bends on the first wheel in the same direction as it is bent when received by the form and the wire bends on the second wheel in the opposite direction. Thus the wire is reversely bent before being received by the form and it is biased to conform to the form more readily.

Further objects and advantages of the present .invention will be apparent from the following description, reference being had to the accompanying drawings wherein a preferred embodiment of the present invention is clearly shown.

In the drawings: Fig. l is a front elevation of the coil winding mechanism.

Figs. 2 and 3 are sectional views taken respectively on lines 2-2 and 3-3 of Fig. 5 Fig. 4 is an end view of shaft 402 in the direction of arrow 4 of Fig. 1 with the form 500 removed.

Fig. 5 is a plan view of the coil winding mechanism.

Fig. 6 is a View of cam 511 looking in the direction of arrow 6 of Fig. 1.

Fig. 7 is a view of said cam looking in the direction of arrow 'I of Fig. 6.

Fig. 8 is an end view taken in the arrow 8 of Figs. 1 and 9.

Fig. 9v is a sectional view on line 9 9 of Fig. 8.

Fig. 10 is a sectional view on line III-I0 of Fig. 9.

Fig. 11 is an end view taken in the direction of arrow II of Fig. 9.

Figs. 11A and 11B are sectional views taken, respectively, on lines I IA-I IA and I IB-.I IB of Fig. 11.

Fig. 12 is a fragmentary sectional View on line I2-I2 of Fig. 1.

Fig. 13 is a fragmentary sectional view on line I3--I3 of Fig. 12.

Fig. 14 is a View in the direction of arrow I 4 of Fig. l2.

Fig. 15 is a fragmentary sectional view on line I5-I 5 of Fig. 12.

Fig. 16 is a view in the direction of arrow I6 of Fig. 15 the part in Section being on line IG-IB of Fig. 12.

direction of 2of l'the former through v'gears 1425' and*V 42 I Fig. 17 is a fragmentary sectional View on line |1|1 of Fig. 1.

Fig. 18 is a front vieW of the winding head half of the winding form.

Fig. 19 is a side view thereof.

Fig. 20`is faivie'wiof'the frame of the vnwinding form looking in the direction of arrow "20 of Fig. 19.

Fig. 21 shows in perspective two of the cutter bars in disassembled relation.

Figs. 22, 23, 24 and 25 show successive -operations performed by the cutter-Ears.

Fig. 26 is a side View o`f-a stationarycutter.

Referring to Figs. 1 and 9, a `frame-4feoarries bearings 40! (retained by caps 40m) for a windshaft 4 5. The sprocket |22 carries a roller bearing |22a journalled on the shaft 402. lNormally the sprocket |22 is loose ion the shaft 402 and is .free to f move=aaially..between the clutch disc VN405 yfixed.v to etheshaft 402 'andra clutch-disc' 406 lWhose hub is splined to squared portion-740i `ofthe-shaft t402 :and isprovided.withafgroove- 408 forreceiving aroller 409 -carried-bylever4 |llpifvoted onfa screw :4| and urged counterclocltwisefbycoilA spring 4 |-2 towarda cam-:4|3provided(by-disc y4|'4 keyedto Athe -shat1404- YWhen-the `cam l'4|3 :rotated clutch; plates 405 fand" 406 tof-engagethe sprocket vi221so Lthat'fit vwillfdrive the shaft 402.

'Shaft'V 45 2 drivesfshaftcM 5 aty one -fourth speed Shaft rH5-rotates apar-11447 forlcontrolling-avalve VI 2,

Lfand la-cam-IHSfforcontrolling a wirefguide to'be 1 described. eShaft' 404is2aY 'controlf shaft whichfh'as climited movement independent of fshaf tf4'l5; fand shaft'MfSdrivesshafteli :For this purposefa lost'motion connection'fis provided Pcomprisinga pin-f'422 carriedfby a disc-423 keyed to-shaftf'404 and receivedlby an arcuateslotf424 l'in the. hub of gear 42|. Trip rod 2|3 CFig. 117)"'Which is :guided'fbyfbushing- 42E-iin frame'f400 is raisedat the proper instant to push against a-'f'screwi426 Aandfraisefa=1everi421 apivted atf'llzlalonl a bracket '#425 to l cause'a bar 430.2piVotefd-at 43 Athereo'n, Yto 'pushza'gainst :a'rnger 432-Ia1ttached zto'a ileverl 433 clamped to the'sh'aft 1464. `Thisilwillc'ause'shaft 404`-=fto move .1'c1o`ckwise .(Figflv) fand-icounterclockwise (Fig. 8) and cam 4|3 to move avv-ay ifrom' lever y'4 t0 .so that spring T415 Zwill lfcause the clutch to engage and shaft 40'2 'drivesfshaft-FMSB. lAs shaft-4 |55 turns, -Iitrpicksupshaftft-M and'after one turn of shaft 4 i 5, cainf4i32i's lre'tiir'neitofh'lne 'rpositionfto1case .leverl 4| 0 ftomove fcounterclock- Wise (Fig. 9) to cause the fclutchtoisengagie. At ythat time, I'eve'r rr433 (iF-iig. 117) l returns to "fhomelposition Asit returnsp-it pushesagainst lever 430, being urged clockwise by a spring 434; andflever430 Eis 7brought byisp'ringe'434 underzthe finger 432. Spring 435 urges flevr w1421 downward.

When ithe clutch i's engaged, fshaft 4112 -must stop dead This is accomplished by providing :the lhlib-lange 440 of -rclutch disc 406 'With a .f

hardened metal socket-piece 44| (Fig. 113) v`for .receiving alockirig-nleverf-442A (Fig. 4) l'attach'ed to a shaft 443 journaled vertically in'abracket v444. 'As shown-in Figs.12 and-'116, thereis a'am disc 44,5 driven by shaft 404 which providesa'an 445 for engagingA afspringmetal'leverf441 a'ttacled to a hub 448 pivotally supported :fby'fshaft 443 in axial :alignment ntherewith 'but axially f adjustable relative zthereto. y vHub-44'8-hasan -ar m-450carry ing a screw 45| which is engaged by a sring452 ico `is urged counterclockwise (Fig. 16) and, hence,

Sarin'i45'4jfsliaft 443 and lever 442 which is caused tosnap intothe recessed block 44|. Hence shaft y402'is-stopped dead at the end of four revolu- -tions-orwhateverits cycle may be. Shaft 402 is --notlstopped' when Vthe power is on. The Winder clutch is opening ahead of the end of the winding cycleLand-thevshaftEtZ coasts under momentum intoitsstopfposition. Arrow 440a (Fig. 14) indicates the motion of part 44E which is arrested. Thelshock of engagement of parts 44| and 442 is taken up by a rubber block 444e connned under compression Abetween frame 400'1and :a fshiftable :bearing bl`ock444bfand urging -thefsamenormally againstlbearingblockf444a. Thesebearing blocks are parts of the bracket 444.

-iPreca-ution istaken against rebound 'ofele'ver 442, yas spring' lever"-44 is'substantially stressed Ibefore lever 442 V:snaps into `locking position. Therefore. justas vlever-'442 :snaps into L-the recessed block 44|, a lever 451 V4'arrives at the posi- -tion shown'in Figs. v12,1'4andl6to overlaplever l442 :and fprevent rebound. 1 Lever '451 `is` attached to a -rod 4523 ,.'1pivotall-y ysupported fby #frame "400. fA spring i 459 attached to afstud460 offlever v-451 Aarid to-afstudf45| 'attached tol' frame 4001(Fig.=`5) lurged a -rollerf452Y carried by "lever 458 againsta -cam lober yprovidedby disc 445. When-disc y445 .is'rotated c'ounterclookwise(Fig.=12) in-1re :sponse to' upwardy movement -of rod-213 (Figwll) cam lobe-463 .pushes lever '-451' counterclockwise sothat its lower end will'be to the right oflia shou1der'464 'of-'lever S442y and-belowv s'aid lshoulder =in"Fig. .'1-6; rConcurr'ently, cam lobe *446 leaves Ylever -44'|, leaving'isprin'g 452Y freeft'o rotat'eflever 442 clockwise 'outff lockingen'gagementiwith -the clutch hub 440 ;'and,frconcurrentlyjcam'| 3fleav'es lever'M- (Fig. 9) sothat shafts f`402 andv 4f|5 and 404 start frotation. "Shafts-f4 |5` and@ 404"\ifo ktate1'counterclockwise in'Fig. 12. `Whilelev`er^451 clears the shoulder-464 of leverllzfduetortatin offcam :463 .'abouto, 1everf442 lis fin 'unlocking position. 1Afterf506ffcfam rotation, leferf4514i's lpulled against shoulder *464 "byspring 450; n'd lever '457 isfcock'ed ready to'rnove into blocking position 'when lever 442 is" forced byfca'm 446;' and spring flev'erig/lA into locking position "atthe (and of 'one turnf'o'f shaft 'f4 |15.

bored portion 504 adapted to receive a disc 505 provided by shaft 402. Fromvdisc 505 extends two lugs 506 spaced apart to receive the side surfaces 502 and 503 of frame 501 when the latter is attached to shaft 402 by screws which pass through counterbored holes 501 in disc 505 (Fig.

,4) and which thread into holes 501a (Fig.

in part 501. Notch 505a in disc 505 provides clearance for levers 532, 542 to be described. Screws 508 and dowels 509 attach to frame 501 a form 510 having stepped surfaces A, B and C adapted to match with similar surfaces provided by the companion half of the coil form as shown in application Ser. No. 733,758. The form 510 ls provided with edge surfaces a through h which match with similar surfaces provided by said companion half of the forni. Across the plate 510 there extends a notch 511 for the purpose of providing clearance for parts of said companion half of the form. As the coil form is rotated about the axis of the shaft 402 in a counterclockwise direction as viewed in Fig. l1, wire is guided on the form by guide Wheels 415. The guiding of the Wire upon the form is assisted by surfaces 512 and 513, the latter being provided by a plate 514 attached by screws 515, said plate having an oblong hole 516 in alignment with a notch 511 provided by the frame 501. The notch 511 receives two plates 518 and 519 (Fig. 20) of hardened and ground steel shaped substantially alikeyas shown in Fig. 26 and each having a notch 520. When the plates 518 and 519 are attached to the frame 501 as indicated in Fig. 20, their notches 520 will be in alignment. At the end of a Winding operation the wires are guided by the Wire guide Wheels 413 into the notches 520 of the plates 513 and 519. The guiding of the wires into these notches is assisted by surface 521 provided by the frame 501 and by the surface 522 provided by bracket 523 attached to the frame by screws 524 received by the tapped holes 525 of the frame (Fig. 20). The Wires which provide the end leads of the coil after it is wound will be located in a groove 525` into which the Wires are directed by surface 521 of a bracket 528 attached by a screw 523 threaded into a tapped hole 530.

In alignment with the notch 511 there is a groove 531 (Fig. 20) which receives cutter bars 532 and 542 Which are made separately of steel hardened and ground and are then attached by a rivet passing through holes 532a and 542a. The holes 5325 and 5425 receive a fulcrum pin 533 which extends through hole 532a of the frame 501. Bar 532 is notched out at 534 to provide a head 535 having a rounded or dull corner, a nose 535 also having a rounded upper corner surface and wire cutting jaws 531 and 538, which are the full thickness of the metal of the bar 532 which is a greater thickness than that of the head 535 and the nose 536. The cutting surfaces. 531 and 538 closely engage the cutter plate 518. The bar 542 has a shape somewhat similar to bar 532, but it is provided with sharp cutting edges 543 and 544 Which closely engage the stationary cutter bar 519. When a companion form is advanced to form 500, dowel pins 5011) (Figs. 18 and 19) of the latter are received by dowel bushings of the companion form as disclosed in application Ser. No. 733,758.

To start winding a coil upon the form it is necessary to anchor the free end of the Wire thereto before starting to wind. The disclosed machine winds two wires simultaneously, but for the sake of convenience, reference will be made only to one Wire W1. Thewire vis pulled from a supply reel and placed across the notch 520. While thus positioned by the operator, a rod 562 (Figs. 1 and 5) to move right so as to engage the bars 532 and 542 and to cause them to move clockwise (Fig. 19). When the bars move right, Wire Wl (Fig. 22) will be cut by the coaction of edge 543 and plate 519 at :r and the head 535 Will bend it around the notch 520 of plate 518. The completion of the bend is shown at W2 in Fig. 23. The length of the bent portion is much exaggerated in the drawings as about .025 is sufficient to provide an anchor. By means to be described, the bars 532, 542 are caused to move to the position shown in Fig. 24 and the wire shifts to W1 and W2. After Winding a coil is completed. The bars 532, 542 move to the position shown in Fig. 25. Hook end W2' is cut off as indicated at W2" and the end lead W3 of the coil just Wound is cut at y leaving Wire W4 which is the start lead of the next coil to be wound. W4 is bent (just as W2 was bent in Fig. 23) to provide the anchor for the next coil to be Wound; and Winding proceeds as before. Movement of bars 532g, 542 from the position of Fig. 24 to the position of Fig. 25 frees the end lead of the Wound coil from the form 500 and anchors thereto the start lead of the next coil to be Wound thereon. The return of Wire cut-off levers 532, 542 to the position shown in Figs. 5 and 24 is effected automatically during rotation of the form 500 by cam 511 provided by a bracket 513 (Figs. 6 and 7) attached to frame 400 (Fig. 1).

To trip the Winder clutch, a certain rotary movement of shaft 404 (Figs. 12 and 17) is required. In order to meet this requirement, certain adjustments are provided. Adjustment of nut 414a relative to bushing 4145 (Fig. 9) surrounding shaft 404 adjusts cam 413 axially to compensate for Wear of the clutch facings of discs 405 and 406 so that the normal spacing of these facings can be maintained. Adjustment of nut 4161) relative to threaded sleeve 415m attached to shaft 402 takes up end play of this shaft. In order that the Winder clutch will operate in the intended manner, lubricant of the bearing 122e is prevented from contacting the clutch facings by oil slingers 1225.

The required movement of shaft 404 (Fig. 17) is obtained by a certain upward movement of rod 213 effected as shown in application Ser. No. 733,758 by a pressure fluid servo which will operate at the proper time provided the companion form-half With which form 500 cooperates has been moved toward form 500 the correct distance. However, if the movement of said companion form-half toward form 500 is obstructed by a Wire, for example, lodged on the face of form 550, the rod 213 cannot be lifted by the servo the distance required to turn shaft 404 (Fig. 17) the angle required to trip the Winder clutch.

Referring to Fig. 11 the wires from the pair of reels 521 located below a bracket 625 are threaded through guides 540 supported by brackets 641 (Fig. 11A) attached to bracket 625 by screws B42 and nuts 643. Each screw 542 provides a pivot for a sleeve 644 which supports discs 545, 640 and '641, urged together by spring 048 retained by nuts 649 threaded on sleeve 644. The Wire which is threaded through guide 541] is placed between the discs 345 and 545 which offer a slight frictional resistance to the passage of the Wire. The two wires are designated by W1 and W2. Wire iorefth'ere" areStWofarmslGE- Twhich ,arevr adjacent fresiliently-biased againstastopiscrewl threadfne'df between fthe ahead @5 I -of fro'd 652 I and Ta disc @Ssiipp'ortedfby rod t6352. The `hublivil-is provided withiahardfrnetal bra-ke drum 5565 Aengaged by brake lining4 56E providedbya brake -ban'dlh Ytheendofiwhi'ch 661e v-(]ig. 11) isfat- =tached`toa lug-"668 'of the bracket"25'an'd"the Lother end of the bandSS'lb is'pvotally con- 'Ynected Awith fa rodv 669 ""Which. passes through lug 'E58 -and thence 'through a spring 670 retained in' a state of compression by vWing nut 6'! Ivv threaded on the"rod"'59. fB'y turningthe nutlllfv the friction exerted bylthe Vbrake band'may beadjust'ed "Thewires WI and-W2 pass'from the fw'heels'l and-"656' around a vdouble"-groove'd '.guide'wheel 614i which is`pivotally snpbortedat :S7- 4vby -the bracket i525.

rTheWire-'WZiSrguidedin a similarmanner by guidem", wheetil and wheel 615. The'parts v'associated with guide-560' and wheel Gare indicated by the same reference numbers `app'lied to corresponding parts associated with guide 649' and Wheelf, bt with a prime ailixed. l'l'teferring to Fig. 11, the'wires pass from Wheels "574,-#61'5 A-arou'nd grooved guide Wheels/5618 piv- -otallysupnorted atf by'a bracket 63B supportedrbyy frame' dit). From Wheels 618,'the" Wires vpassto guidewheelsli'l. Between Wheels 614, 6?5 and wheels 61S, the wires resp'ectivelycontact'groove'dwvheels SEI pivotally'vsupported by :arms-"i682 'jodrnaied on a rod 'G83 carried by bracli'et''i. Ii either wire breals or runsfot, the armi-82 carrying the wheel68l whichhad 'engaged the'wire is vpermitted to rotate counter- -cl'ockwisefbeyond its normal positionto'cause a mercury switch"585'carriedby thatrar'm to close a circuit for causing the machinetostop.

at'the end lofits cycle.

'f'henachine can be readily-adapted'for Winding coils vof"vari'ons sizes'and using different .guage o1 rfire. The tensionvof the brakes'on "'Wheelsf ''iand 55' is adjusted to suit'the'guage ofwir'e. The locationof wire guide'Wheels-'Gl 'a'ndfllSiFigflD relativeito eachother and to theform'fld is such asto put aki'nk in' the Wire 'of such nature that the VWire tends to 'hug the `ormrather than bow-away from it. Due to thisfeature as Well as to the'prop'er v'Wire ltension, the 'coils' arecompactedly and therefore uniformly Wound. rhere is practically no Variation in the lengths 'of `Wires 'infthe`c'oils Therefore the-coils Wound on the same forms Twill have l substantially l identical electrical characteristics.

While "the .i embodiment ref the .present inventionas herein disclosed, constitutes a preferred lform, 'it is'tobe understoodthat'other forms might befadoptedall coming Within the scope of the claimswhich follow.

What is' claimed is as follows:

1. A'coil Winding machine 'comprising a'shait, a'cloil 'winding 'form' driven thereby,"a 'power operated drivingV clutch memberfa `'driven clutch wireguide lc'ontrol --shaft, 1 gears jconnecting LAthe 'shafts' for driving' the -secondfshaft' 'continuosiy a fcainfdriven by -lthe "second shaft, 'la lvWire Y guide Winder control lby' the cam` f la device carried -by andioranchoring '-to'i the form thevstart I1lead-"cf lthe'riext z .succeeding coil, mechanism adapted to "o"rate'fffs'ad/` devicevlhen the YVformstopstinte.v predeterrninedangular' posi-tion,- va4c'ontrolf;shaft 'driiien f--b'y the secondv shaft #through-@a lo'st f rnotion connectionfwhich' provides for movement 'of 'the #contrari-*shaft 'independently' of the-@se'crid sliaft, 4Aa' clutch -disengaging'fmerber connected Withtheclutch driven member, acam operated -byvthe thirdshaftto operate-upon said"clutch -disengaging l' member to Ydisengage fthe cl'utch againstthelaction offsaidlr'st 'spring lslightly in advance of 'movement v'of fthe form-'to stopping position; 'a disc connected With-the clutch`-driven member and providing la notch, Va fnrst'fs'liat locking-'member forengaging the notch' after the clutchA isdisengaged, a second spring urging said locking -frnember away from said .-ldisc, nieans operatedby Y'the controlshaft forbasingfsaid lock-'ing member 'against the notched v' member aheadofidisengagement oftl'e"clutch `vir-hereby thelr'st` shaft coasts into position in 'lvvhihfthe 'notch receives the `locking member,and"ineans for operating thelc'ontrollshaft independently of theilsecond shaft 'to cause Vsaid' cam of' the third f shaft' to release saidv clutchdisengaging "member A"whereby said 'rst vspring is' released to engage the 'clutch andLtofcause-retraetionof the locking'member biasing-means `Wherebythe second 'springl is 4release'd'to"retract Vthe locking member vfroinisaid notch.

2. "A machine according to fclaiin -1 lhaving a latch for preventing rebound of the flocking "member fromthe disc 'following v reception ofthe locking'member byfthenotch of the discg'means for biasing the latch i-'to'war'd:rebound-preventing vposition concurrently 'Withlthe biasing lof the locking member against the-disdiaetual Inovement'of' the latch v'-into "rebound-preventing position being; prevented by' thel lock-ing member before it moves 4into l'the notch Tottheldisc; and means fo'rrretracting '-th'elatch beforelfor'retraction' of 'the locking member from the disc.

135A` coil" Winding 'machine comprising a'fsl'iift. a driving clutch fmember journalled* thereon,`fa. driven clutch member connected Withlthe shaft andrsldable axially thereon to i'engage'thedriving 'clutch member, a first 'spring -urging-the driven clutch `member aganst the fdrivin'g clutch niemb'erfa Wire-guide' control1'shaftgears connecting 'the shaft for Vdriving the 'second shaft continuously at :a vspeed :i less 'than `the speed or the 'rst `shaft, a' coil Winding -`lform Idriven by fthe first shaft, a cam connected with the second shaft'av/ire'guide under control -by vthe earn, vail devicel carried by the 'form forfclltting thezend leadof a Wound'coil'and'forfanchoringtovthe-form the start-lead-of ther-succeeding coil,-a mechanism adapted to "operate said device when-theform stops ina predetermined angularpostion, ak tubular, iconi,ro1-shaft enclosingand supporting the cam-shaft alost -mctionconnection between said-shafts Vproviding for movementof the control shaft independently7 of-the -second shaft, aclutch control-'lever 'connected with the clutch driven fmemb'er, -fa

cam connected with the control shaft and engaging the lever to disengage the clutch against the action of said first spring slightly in advance of movement of the form to said stopping posi-` tion, a disc connected with the driven clutch member and providing a notch, a second lever for engaging the notch in order to retain the Winder form in said position at the end of wind-v ing, a second spring for retracting the second lever from the notch, a cam connected with the control shaft and a third spring operated thereby for moving the second lever against the disc in advance of movement of the Winder-form to said stopping position whereby, as the form coasts to stopping position, the second lever is forced by the third spring into the notch, and a controller for imparting movement to the control shaft independently of the second shaft to move the control shaft cams out of control of the first and second levers.

4. A machine according to claim 3 in which the third spring is a flexible arm extending from the hub of the second lever and in which there is a resilient body to which the second lever transmits through its hub the shock of engagement of the disc with said lever as first shaft is stopped by engagement of the lever with the notch of the disc.

5. A machine according to claim 3 and having means for :preventing rebound of the second lever from the disc notch when forced by the third spring into engagement therewith, said means comprising a third lever, a fourth spring for urging the third lever into the path of movement of the second lever so as to obstruct a rebound movement thereof and a cam connected with the control shaft and operable during said independent movement of the control shaft to move the third lever out of the path of movement of the second lever.

6. A coil winding machine comprising a shaft, a coil winding form driven thereby, a power operated driving clutch member, a driven clutch member connected with the shaft, a first spring for urging the driven clutch member into engagement with the driving clutch member, a wire-guide control shaft, gears connecting the shafts for driving the second shaft continuously at a speed less than the speed of the first shaft, a cam driven by the second shaft, a wire guide under control by the cam, a device carried by the form for cutting the end lead of a Wound coil and for anchoring to the form the start lead of the next succeeding coil, a mechanism adapted to operate said device when the form stops in a predetermined angular position, a control shaft driven by the second shaft through a lost motion connection which provides for movement of the control shaft independently of the second shaft, a clutch disengaging member connected with the clutch driven member, a cam operated by the third shaft to operate upon said clutch disengaging member to disengage the clutch against the action of said first spring slightly in advance of movement of the form to stopping position, a disc connected with the clutch driven member and providing a notch, a first-shaftlocking lever providing a lug to be received by said notch to stop rotation of the first shaft, a resiliently supported fulcruin member pivotally supporting the locking lever, said fulcrum member yielding to take the shock of stopping rotation of said first shaft, flexible lever for biasing the locking lever a second cam operated by the control shaftI to cause the flexible lever to bias the locking lever yieldingly against the disc in advance of clutch disengagement whereby the locking lever lug will be snapped into the notch of the disc as the rst shaft coasts into stop position, a rebound-preventing lever a third cam operated by the control shaft for positioning the rebound-preventing lever in the path of rebound-movement of the locking lever from the disc as its lug is received by the notch of the disc, means for operating the control shaft independently of the second shaft to cause the cams respectively to release the clutch disengaging member, the flexible lever and the rebound-preventing lever and spring means for retracting rebound-preventing lever from the locking lever and the locking lever from the disc.

JAMES S. BURGE.

RICHARD M. GOODWIN.

HILTON J. ,MCKEE REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS 

